42635653639 has 2 divisors, whose sum is σ = 42635653640. Its totient is φ = 42635653638.

The previous prime is 42635653589. The next prime is 42635653657. The reversal of 42635653639 is 93635653624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42635653639 - 2¹³ = 42635645447 is a prime.

It is a super-2 number, since 2×42635653639² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42635653339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21317826819 + 21317826820.

It is an arithmetic number, because the mean of its divisors is an integer number (21317826820).

Almost surely, 2^42635653639 is an apocalyptic number.

42635653639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42635653639 is an equidigital number, since it uses as much as digits as its factorization.

42635653639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10497600, while the sum is 52.

The spelling of 42635653639 in words is "forty-two billion, six hundred thirty-five million, six hundred fifty-three thousand, six hundred thirty-nine".